﻿/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#if NET35

using System;

namespace Lucene.Net.Support.Compatibility
{
    public class ThreadLocal<T> : IDisposable
    {
        [ThreadStatic]
        static WeakDictionary<ThreadLocal<T>, T> slots;

        static void Init()
        {
            if (slots == null) slots = new WeakDictionary<ThreadLocal<T>, T>();
        }

        public T Value
        {
            set
            {
                Init();
                slots.Add(this, value);
            }
            get
            {
                Init();
                return (T)slots[this];
            }
        }

        public void Dispose()
        {
            if (slots != null) slots.Remove(this);
        }
    }
}

#endif